779120990791 has 16 divisors (see below), whose sum is σ = 915483588768. Its totient is φ = 653698800000.

The previous prime is 779120990783. The next prime is 779120990833. The reversal of 779120990791 is 197099021977.

It is a cyclic number.

It is not a de Polignac number, because 779120990791 - 2³ = 779120990783 is a prime.

It is a super-2 number, since 2×779120990791² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (779120999791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412041 + ... + 1314541.

It is an arithmetic number, because the mean of its divisors is an integer number (57217724298).

Almost surely, 2^779120990791 is an apocalyptic number.

779120990791 is a deficient number, since it is larger than the sum of its proper divisors (136362597977).

779120990791 is a wasteful number, since it uses less digits than its factorization.

779120990791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908562.

The product of its (nonzero) digits is 4500846, while the sum is 61.

The spelling of 779120990791 in words is "seven hundred seventy-nine billion, one hundred twenty million, nine hundred ninety thousand, seven hundred ninety-one".